This circuit can generate signals of different frequencies, switched by a DC voltage. The frequencies are determined by the crystals. The circuit is from a 90s American documentation.
The relay of this circuit closes when the position set in P2 is reached by the sensor...
In this circuit the output voltage is given by xx. The L series circuits are for a maximum current of...
This circuit consists of an electrostatic sensor that can check if a cable is energized by simply...